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│   └── modal
│       ├── Content.tsx // 维护 Modal 的内容，用于 h 函数和 jsx 语法
│       ├── Modal.vue // 基础组件
│       ├── config.ts // 全局默认配置
│       ├── index.ts // 入口
│       ├── locale // 国际化相关
│       │   ├── index.ts
│       │   └── lang
│       │       ├── en-US.ts
│       │       ├── zh-CN.ts
│       │       └── zh-TW.ts
│       └── modal.type.ts // ts类型声明相关
</code></pre></div><p>因为 Modal 会被 <code>app.use(Modal)</code> 调用作为一个插件，所以都放在<code>plugins</code>目录下</p> <h3 id="组件内容"><a href="#组件内容" class="header-anchor">#</a> 组件内容</h3> <p>首先实现<code>modal.vue</code>的主体显示内容大致如下</p> <div class="language-html extra-class"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Teleport</span> <span class="token attr-name">to</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>body<span class="token punctuation">&quot;</span></span> <span class="token attr-name">:disabled</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!isTeleport<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">v-if</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>modelValue<span class="token punctuation">&quot;</span></span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>modal<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span>
             <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>mask<span class="token punctuation">&quot;</span></span>
             <span class="token attr-name">:style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>style<span class="token punctuation">&quot;</span></span>
             <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>maskClose &amp;&amp; !loading &amp;&amp; handleCancel()<span class="token punctuation">&quot;</span></span>
             <span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>modal__main<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>modal__title line line--b<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span><span class="token punctuation">&gt;</span></span>{{ title || t(&quot;r.title&quot;) }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span>
                      <span class="token attr-name">v-if</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>close<span class="token punctuation">&quot;</span></span>
                      <span class="token attr-name">:title</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>t(<span class="token punctuation">'</span>r.close<span class="token punctuation">'</span>)<span class="token punctuation">&quot;</span></span>
                      <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>close<span class="token punctuation">&quot;</span></span>
                      <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!loading &amp;&amp; handleCancel()<span class="token punctuation">&quot;</span></span>
                      <span class="token punctuation">&gt;</span></span>✕<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span>
                    <span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>modal__content<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Content</span> <span class="token attr-name">v-if</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>typeof content === <span class="token punctuation">'</span>function<span class="token punctuation">'</span><span class="token punctuation">&quot;</span></span> <span class="token attr-name">:render</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>content<span class="token punctuation">&quot;</span></span> <span class="token punctuation">/&gt;</span></span>
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>slot</span> <span class="token attr-name">v-else</span><span class="token punctuation">&gt;</span></span>
                    {{ content }}
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>slot</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>modal__btns line line--t<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">:disabled</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>loading<span class="token punctuation">&quot;</span></span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>handleConfirm<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
                    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>loading<span class="token punctuation">&quot;</span></span> <span class="token attr-name">v-if</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>loading<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span> ❍ <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>{{ t(&quot;r.confirm&quot;) }}
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!loading &amp;&amp; handleCancel()<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
                    {{ t(&quot;r.cancel&quot;) }}
                <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>Teleport</span><span class="token punctuation">&gt;</span></span>
</code></pre></div><p>最外层上通过Vue3 <code>Teleport</code> 内置组件进行包裹，其相当于传送门，将里面的内容传送至<code>body</code>之上</p> <p>并且从<code>DOM</code>结构上来看，把<code>modal</code>该有的内容（遮罩层、标题、内容、底部按钮）都实现了</p> <p>关于主体内容</p> <div class="language-html extra-class"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>modal__content<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Content</span> <span class="token attr-name">v-if</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>typeof content===<span class="token punctuation">'</span>function<span class="token punctuation">'</span><span class="token punctuation">&quot;</span></span>
             <span class="token attr-name">:render</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>content<span class="token punctuation">&quot;</span></span> <span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>slot</span> <span class="token attr-name">v-else</span><span class="token punctuation">&gt;</span></span>
        {{content}}
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>slot</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
</code></pre></div><p>可以看到根据传入<code>content</code>的类型不同，对应显示不同得到内容</p> <p>最常见的则是通过调用字符串和默认插槽的形式</p> <div class="language-html extra-class"><pre class="language-html"><code>// 默认插槽
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Modal</span> <span class="token attr-name">v-model</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>show<span class="token punctuation">&quot;</span></span>
       <span class="token attr-name">title</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>演示 slot<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>hello world~<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>Modal</span><span class="token punctuation">&gt;</span></span>

// 字符串
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Modal</span> <span class="token attr-name">v-model</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>show<span class="token punctuation">&quot;</span></span>
       <span class="token attr-name">title</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>演示 content<span class="token punctuation">&quot;</span></span>
       <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>hello world~<span class="token punctuation">&quot;</span></span> <span class="token punctuation">/&gt;</span></span>
</code></pre></div><p>通过 API 形式调用<code>Modal</code>组件的时候，<code>content</code>可以使用下面两种</p> <ul><li>h 函数</li></ul> <div class="language-js extra-class"><pre class="language-js"><code>$modal<span class="token punctuation">.</span><span class="token function">show</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  title<span class="token operator">:</span> <span class="token string">'演示 h 函数'</span><span class="token punctuation">,</span>
  <span class="token function">content</span><span class="token punctuation">(</span><span class="token parameter">h</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token function">h</span><span class="token punctuation">(</span>
      <span class="token string">'div'</span><span class="token punctuation">,</span>
      <span class="token punctuation">{</span>
        style<span class="token operator">:</span> <span class="token string">'color:red;'</span><span class="token punctuation">,</span>
        <span class="token function-variable function">onClick</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter">$event<span class="token operator">:</span> Event</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'clicked'</span><span class="token punctuation">,</span> $event<span class="token punctuation">.</span>target<span class="token punctuation">)</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      <span class="token string">'hello world ~'</span>
    <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre></div><ul><li>JSX</li></ul> <div class="language-js extra-class"><pre class="language-js"><code>$modal<span class="token punctuation">.</span><span class="token function">show</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  title<span class="token operator">:</span> <span class="token string">'演示 jsx 语法'</span><span class="token punctuation">,</span>
  <span class="token function">content</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token punctuation">(</span>
      <span class="token operator">&lt;</span>div
        onClick<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token parameter">$event<span class="token operator">:</span> Event</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'clicked'</span><span class="token punctuation">,</span> $event<span class="token punctuation">.</span>target<span class="token punctuation">)</span><span class="token punctuation">}</span>
      <span class="token operator">&gt;</span>
        hello world <span class="token operator">~</span>
      <span class="token operator">&lt;</span><span class="token operator">/</span>div<span class="token operator">&gt;</span>
    <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre></div><h3 id="实现-api-形式"><a href="#实现-api-形式" class="header-anchor">#</a> 实现 API 形式</h3> <p>那么组件如何实现<code>API</code>形式调用<code>Modal</code>组件呢？</p> <p>在<code>Vue2</code>中，我们可以借助<code>Vue</code>实例以及<code>Vue.extend</code>的方式获得组件实例，然后挂载到<code>body</code>上</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">import</span> Modal <span class="token keyword">from</span> <span class="token string">'./Modal.vue'</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> ComponentClass <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span>Modal<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> instance <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ComponentClass</span><span class="token punctuation">(</span><span class="token punctuation">{</span> el<span class="token operator">:</span> document<span class="token punctuation">.</span><span class="token function">createElement</span><span class="token punctuation">(</span><span class="token string">&quot;div&quot;</span><span class="token punctuation">)</span> <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
document<span class="token punctuation">.</span>body<span class="token punctuation">.</span><span class="token function">appendChild</span><span class="token punctuation">(</span>instance<span class="token punctuation">.</span>$el<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre></div><p>虽然<code>Vue3</code>移除了<code>Vue.extend</code>方法，但可以通过<code>createVNode</code>实现</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">import</span> Modal <span class="token keyword">from</span> <span class="token string">'./Modal.vue'</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> container <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">createElement</span><span class="token punctuation">(</span><span class="token string">'div'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> vnode <span class="token operator">=</span> <span class="token function">createVNode</span><span class="token punctuation">(</span>Modal<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">render</span><span class="token punctuation">(</span>vnode<span class="token punctuation">,</span> container<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> instance <span class="token operator">=</span> vnode<span class="token punctuation">.</span>component<span class="token punctuation">;</span>
document<span class="token punctuation">.</span>body<span class="token punctuation">.</span><span class="token function">appendChild</span><span class="token punctuation">(</span>container<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre></div><p>在<code>Vue2</code>中，可以通过<code>this</code>的形式调用全局 API</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token function">install</span><span class="token punctuation">(</span><span class="token parameter">vue</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
       vue<span class="token punctuation">.</span>prototype<span class="token punctuation">.</span>$create <span class="token operator">=</span> create
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>而在 Vue3 的 <code>setup</code> 中已经没有 <code>this</code>概念了，需要调用<code>app.config.globalProperties</code>挂载到全局</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token function">install</span><span class="token punctuation">(</span><span class="token parameter">app</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        app<span class="token punctuation">.</span>config<span class="token punctuation">.</span>globalProperties<span class="token punctuation">.</span>$create <span class="token operator">=</span> create
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><h3 id="事件处理"><a href="#事件处理" class="header-anchor">#</a> 事件处理</h3> <p>下面再看看看<code>Modal</code>组件内部是如何处理「确定」「取消」事件的，既然是<code>Vue3</code>，当然采用<code>Compositon API</code> 形式</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token comment">// Modal.vue</span>
<span class="token function">setup</span><span class="token punctuation">(</span><span class="token parameter">props<span class="token punctuation">,</span> ctx</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">let</span> instance <span class="token operator">=</span> <span class="token function">getCurrentInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 获得当前组件实例</span>
  <span class="token function">onBeforeMount</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
    instance<span class="token punctuation">.</span>_hub <span class="token operator">=</span> <span class="token punctuation">{</span>
      <span class="token string">'on-cancel'</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
      <span class="token string">'on-confirm'</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span><span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

  <span class="token keyword">const</span> <span class="token function-variable function">handleConfirm</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
    ctx<span class="token punctuation">.</span><span class="token function">emit</span><span class="token punctuation">(</span><span class="token string">'on-confirm'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    instance<span class="token punctuation">.</span>_hub<span class="token punctuation">[</span><span class="token string">'on-confirm'</span><span class="token punctuation">]</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
  <span class="token keyword">const</span> <span class="token function-variable function">handleCancel</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
    ctx<span class="token punctuation">.</span><span class="token function">emit</span><span class="token punctuation">(</span><span class="token string">'on-cancel'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    ctx<span class="token punctuation">.</span><span class="token function">emit</span><span class="token punctuation">(</span><span class="token string">'update:modelValue'</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    instance<span class="token punctuation">.</span>_hub<span class="token punctuation">[</span><span class="token string">'on-cancel'</span><span class="token punctuation">]</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>

  <span class="token keyword">return</span> <span class="token punctuation">{</span>
    handleConfirm<span class="token punctuation">,</span>
    handleCancel
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</code></pre></div><p>在上面代码中，可以看得到除了使用传统<code>emit</code>的形式使父组件监听，还可通过<code>_hub</code>属性中添加 <code>on-cancel</code>，<code>on-confirm</code>方法实现在<code>API</code>中进行监听</p> <div class="language-js extra-class"><pre class="language-js"><code>app<span class="token punctuation">.</span>config<span class="token punctuation">.</span>globalProperties<span class="token punctuation">.</span>$modal <span class="token operator">=</span> <span class="token punctuation">{</span>
   <span class="token function">show</span><span class="token punctuation">(</span><span class="token parameter"><span class="token punctuation">{</span><span class="token punctuation">}</span></span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token comment">/* 监听 确定、取消 事件 */</span>
   <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>下面再来目睹下<code>_hub</code>是如何实现</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token comment">// index.ts</span>
app<span class="token punctuation">.</span>config<span class="token punctuation">.</span>globalProperties<span class="token punctuation">.</span>$modal <span class="token operator">=</span> <span class="token punctuation">{</span>
    <span class="token function">show</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
        <span class="token comment">/* 其他选项 */</span>
        onConfirm<span class="token punctuation">,</span>
        onCancel
    <span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">/* ... */</span>

        <span class="token keyword">const</span> <span class="token punctuation">{</span> props<span class="token punctuation">,</span> _hub <span class="token punctuation">}</span> <span class="token operator">=</span> instance<span class="token punctuation">;</span>

        <span class="token keyword">const</span> <span class="token function-variable function">_closeModal</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
            props<span class="token punctuation">.</span>modelValue <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
            container<span class="token punctuation">.</span>parentNode<span class="token operator">!</span><span class="token punctuation">.</span><span class="token function">removeChild</span><span class="token punctuation">(</span>container<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span><span class="token punctuation">;</span>
        <span class="token comment">// 往 _hub 新增事件的具体实现</span>
        Object<span class="token punctuation">.</span><span class="token function">assign</span><span class="token punctuation">(</span>_hub<span class="token punctuation">,</span> <span class="token punctuation">{</span>
            <span class="token keyword">async</span> <span class="token string">'on-confirm'</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span>onConfirm<span class="token punctuation">)</span> <span class="token punctuation">{</span>
                <span class="token keyword">const</span> fn <span class="token operator">=</span> <span class="token function">onConfirm</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token comment">// 当方法返回为 Promise</span>
                <span class="token keyword">if</span> <span class="token punctuation">(</span>fn <span class="token operator">&amp;&amp;</span> fn<span class="token punctuation">.</span>then<span class="token punctuation">)</span> <span class="token punctuation">{</span>
                    <span class="token keyword">try</span> <span class="token punctuation">{</span>
                        props<span class="token punctuation">.</span>loading <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
                        <span class="token keyword">await</span> fn<span class="token punctuation">;</span>
                        props<span class="token punctuation">.</span>loading <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
                        <span class="token function">_closeModal</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
                        <span class="token comment">// 发生错误时，不关闭弹框</span>
                        console<span class="token punctuation">.</span><span class="token function">error</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span><span class="token punctuation">;</span>
                        props<span class="token punctuation">.</span>loading <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
                    <span class="token punctuation">}</span>
                <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
                    <span class="token function">_closeModal</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token punctuation">}</span>
            <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
                <span class="token function">_closeModal</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
            <span class="token string">'on-cancel'</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                onCancel <span class="token operator">&amp;&amp;</span> <span class="token function">onCancel</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token function">_closeModal</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
</code></pre></div><h3 id="其他完善"><a href="#其他完善" class="header-anchor">#</a> 其他完善</h3> <p>关于组件实现国际化、与<code>typsScript</code>结合，大家可以根据自身情况在此基础上进行更改</p> <h2 id="参考文献"><a href="#参考文献" class="header-anchor">#</a> 参考文献</h2> <ul><li>https://segmentfault.com/a/1190000038928664</li></ul></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">更新时间:</span> <span class="time">12/14/2021, 10:12:35 AM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
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